Superheater header



June 17, 1930.

o. 'v. THIELE 'SUPERHEATER HEADER Filed Aug- 1928 3 Sheets-Sheet 1 ZJU' INVENTOR.

June 17, 1930. 0, v, TH|ELE 1,764,860

SUPERHEATER HEADER Filed Aug. l, 1928 3 Sheets-Sheet 2 INVENTOR.

J 3 o. v. THIELE 64,

' SUPERHEATER HEADER Filed Augrl, 1928 3 Sheets-Shee't 3 Hg/5 F/ /ti 1 N VEN TOR.

Patented June 1' 7, 1930 eme osrres o'r'ro v. ,THIELE, I OE BIDGEWOOD, NEW JERSEY; ASSIGNQR To THE, SUPERHE'A'DER COMB-ANY; or NEWY.ORK, N; Y.

SUPERHEATER; HEADER,

.Ap'plication filed! August. 1, 1923.. SerialKNo. 296,703.

5 their ends connected to a header. located in thesmoke-box, the steainbeing led from the boiler to the header, circulating; from the header through the heating units or elements,: andibeing, returned by them t0.the,- header,

and then beingdeliverediby the header in sue perheated state-t0 the engine.

Thegeneral arrangement. of this type of superheaterahas become thoroughly standard- 'izedthroughout theworld. The header isv muniversally locatedinthe upper portion of the. s1noke box betweenthe front flue sheet andthe smoke-stack. The material used during thelasttwelve or. fifteen years for these headers has-been practically universally cast satisfactory. There are some advantages, however, .in. usingsteel. instead of; cast: iron, the principalone being. thatthe. header can thereby be made. materially, lighter in weight,

has. been recognized.- and -constructions en1 ploying steel have been proposed. heretofore. Castings-the header ofgsteel has Provedrather difiicult so far and suggestionsfor theuse of steelhave been ."pretty well limitedlto steel in. the form-10f rolled sheets... These; sheets canbe shaped-land.Weldedintoheaders in Va..- riousways.v It is highly desirable, however, for the sake of interchangeabilityto.havethe steel headers of ;such.confonnation.that heat; ing'elements designed for. use-with the stand ardcast iron headers can be equally.well,used in connection withthe substituted steelIheadlers andvice versa. VViththis necessity confronting the engineer-,. a. numberv of; difli'cuL tiesfappear. I 3 n It. is the purpose otltlie. present'invention to turnishaheader which shall meet the re quireinentsqjust pointed out. "llhe detailed advantages of the construction forlningithe basis of the presentinvention Will be apparent from the following specifi'cation.

The invention is illustratedin the drawings herewith, in which .Fig. 1 is. a. plan :view,

iron and this has-in practice provedentirely which is sometimes a..c0nsideration. This .plished with theuse of ordinary sheets. Re-

ing is partly. insection on 1111191 1-1. of. of} a header according to-the 'present invention; Fig. .2 is a front view ofthe header, aportion of. it: being in section. on; theline. 2+2, off Fig. 1; Fig. 3 is a sectional view on line,3f'j3f ofFig. 1.; FigAis-avieW similar. to Fig. 3$of the-.moclification; Figs. ,5 and. 6 show in, plan. two elements which are united to forma partitionused inthe construction; Fig. 7 shows; the twoqelements secured together; intheir relative positionready for. use infa header; 6Q Figs. 8 and9 are lateral views of Figs. 5 and; 6 respectively; Figs. .10 and llJshow two, sheets usedin the constrnction as they appear. before they are bent into shape; F igs; 12. and 13 are lateral views of the same two. sheets; Figs. 14 and15show the two sheets 1 bent. into shape ready. for assembly, these two views being lateral views; andFigs. 16 and 17"show two ways. in whichcertainlpor- I tions ofjthe plates shown in Figs. .lOandll. 7e are reinforced. g i l The first four figures are on a larger scale than Figs. 5e15,, andQFi'gs. 16j-andj17 are on astill larger scale.

I In. making a. header according to'lny. i11 vention, I first out two sheets into thesha ae illustrated in Figs..10,and 11. Eachsheet hasacentral portion Hand 1 respectively and-a. number of tabs 2 2 and 2 2 re-' spectively; projectingjfroni.them. For rea sons .whiclrwillappear more clearly herein: after, one set of tabs (tlielower in Fi'gsf-lO and 12,a11d{tlie up1er in Figs. 11. and are made, heavier. 'lhis can be done in.anypreferred manner. Special sheets jfor' exe s5 ample, canbe rolledyfbr thispurpose. In

Figs. 16 and 1.7 there arej. illustrated two ways in whichvthis reintorcing-canbe accom;

terring for example to Fig. '16; a portion 3 9g of the sheet 1 is bent. over into contact with the sheet." Holes4 4' have been formedby punching or otherwise in theportion and the portion 3 'i-s weldedto the sheet 1 by filling the welding material into the h'olesgl; These holes are distributed; over available areas throughout the portions 3; The weld; preferably. done by. oxyacetylene means.

lnstead oi punchiiigthe platje andfusing 1.90

the oxy-acetylene method, an electric resistance method can be used as illustrated in Fig. 17 where thebent-over portion 3 is welded to the sheet 1 at the points e l Holes 15*15 are formed by drilling or any preferred manner in the reinforced tabs 2-2 and 2 -2". out sothat they have conical seats as clearly illustrated in Figs. 2 and3. h

After the sheets have been finished as illustrated in Figs. 10 to 13, they are next bent into the shape illustrated in Figs. 1 1- and 15. The tabs Qfl-Q at one side of the sheet will lie above the corresponding tabs 2-2 at the other side and similarly tabs 2 -2 he one set opposite the other." The portion between the tabs of each sheet forms'an elongated chamber open at the side toward the tabs as well as at its ends. 1

In Figs. 5 tot) whichis to be used in'connection with the portions of Figs-'14 and 15 in making the header. This partition comprises two strips of a width equal to the distance between the tabs 2 2 and Q -2" in Figs. 14: and 15. The, strip in Fig. 5 is bent so that it has oer-f tain straight portions fi -6 in a straight line,and'projectingfrom these alined portionsit has rectangular boxes or fin'gers'T The distance. between the adjacent fingers H rtF-lis wider than the width of the fingers. ,Thesecond sheet, shown in Fig. 6, is symmetrical with respect to thatotFi'g. 5.

\ Straight-portions li -6 have extending from them the fingers 7 7" which are also spaced farther apart than their own Width.

The outerp'o'rtions8 [-8 and 8"-'8 extend beyond the alined portions 6 and 6, andtheseextended parts vare round in shape as shown at 9 and 9 of Figs. j8 and 9respectively. 7 v

These two bent strips of'Figsh to 9 are/next assembled into the position shown in Fig. 7. The fingers of each strip extend into the spaces between the fingers of the other, and

, the tips of the fingers of one contact with the straight portions of the other, At these points bfcohtactlO-IO the two-strips are j preferably secured together.

. This may be done either by riveting as'illustrated in Fig. 7, or by any; other preferred means. p

.As clearly appears inFig. 7, this procedure leaves slots 11 11 between adj'acent'fing'ers, the purpose of which slots will a pear presently f. j i

, This partition of Fig. 17 is next inserted into oneflflofithe bent sheets of Figs; lliand 15 in anianner that willappear moreiclearly from an inspection of Figs. 1-, 2' andBL The edges'of the tabs 2"- contact withthe edges of the fingersi land of the straightport1ons66 while the edges of the'tabs. Q Q" contact with the edges of the fmgers 77 7l and of thestraightpieces 6 6. In" other words, the two plates of Figs. lfO-and 11 are These holes are reamed is illustrated a partition' so placed relatively to each other that their tabs occur in alternating relation. in two parallel planes and the double partition of Fig. 7 is inserted between the two, its edges abutting against the edges of the former. The edges are next welded. together, the edges of one strip beingwelded to one plate and its tabs and the edges of the other strip to the other plate and its tabs. It will be noted that every portion along which welding has to be done is perfectly accessible from the outside. Preferably reinforcing corner pieces 1 and 1 are secured by welding in the positions shown in Fig. 1.

In assembling the strips and plates as just described, the portions J -S) and"9 9 come to lie respectivelyin the) correspondingly shaped ends offthe elongated chamber shown in end view inFigs. 14 and 15 These arcuate edges are likewise welded together. The result of these manipulationsls'a structure in which there are two entirely closed chainbers not directly communicating with each other, and having intermeshing fingers, these fingers being separated by slots.

The holes 15- 15 described above' willall lie in one face andtheirspacing has been 132111 in Fig. 2. Here it will-be noted that the bolt 17' extends through the slot 11. Its

head 'bears'against the upper side of thc header or more sneciticall a ainst the u '4 a. V e A 'per end; of the two stripsfOi-nnng the space 11. The lower end o'f the bolt 17 carries a nut which onbeing"drawn up forces'the' clamp 18 upward, pressing against the two washers 20-'2Q, thereby forcing the enlarged ehdsfiZl-Zl of the superheater elements against their seats. This isiin accordance with the ordinary construction. "As many boltswill eXtend through each slot l1 as there are pairs of element ends. 7

The reason for thickening those portions of the {plates to whichthe ends of the super heating elements are secured is two-fold.

The deforming tend Boy of the pressure ex- 1 erted by pulling up; the nut-son bolts 17 is thereby better res1sted,.and more material is present for the formation of'seats for the e'n larged unit ends. The latter becomes iniportant as the seats are re groundfromtime reams; r 1

chambers along the 'line' 22,"and into the to wliich the end of the dry 7 e e V In order to admit steam ii'itethis header, a, port on is cutout of one of the elongated cured. In a similar fashion, portions are cut out from the elongated chamber of the other plate along the lines 242t, and connections 2525 arewelded into these openings- The holes may be cut out before the sheets are bent, or at a subsequent stage. In the latter case the preferred method is by meansof an oxy-acetyleneflame.

Preferably the reinforced tabs 2 and 2 which will in the finished article lie on the outer sides extend beyond the'edge of the sheet as shown at 26 and 27 in Figs. 10 and 11. These projecting portions will form supports for-the header by means of which it can easily be secured in position in the smoke-box.

In the form of the header so far described, the elongated chambers are shown circular in cross-section. If preferred these chambers can be given a rectangular form as'in 1 and 1 in Fig. 4. Except for this change in the shape of these elongated chambers, the header of Fig. 4 is closely similar to that of the form first described.

Other variations will readily occur in practice without a sacrifice of the real invention. i

I claim:

1. The method of making a sheet-steel superheater header, including the steps of cutting a sheet to a generally rectangular form having rectangular spaced tabs on two opposite edges, the tabs on one edge lying opposite those on the other; bending the sheet so that the tabs of one edge lie above those of the other and are spaced from them, and

so that the portion of the sheet between the tabs forms an elongated chamber closed'on three sldes.

2. The method of making a sheet-steel.

cutting and bending a sheet in accordance with claim .1, bending a strip of sheet-steel of the proper width into such shape that it can be'placed with its two long edges coinciding with the edges of the tabs. and the edges of the sheet between the tabs, placing the strip into said position, and welding'said edges together," thereby closing the fourth side of said chamber.

3. The method. of making a sheet-steel sup'erheaterheader, comprising the steps of cutting and'bendlng two sheets 1n accordance with claim 1, placing them together sothat the tabs of the two sheets lie in alternating relation intwo planes, insertlng a sultably formed partition in contact with all of the edges of all of said tabs, and with the edges.

of the sheet between. the tabs, and welding it to said edges.

4. The method of making a partition for a sheetsteel superheater header, includlng the steps of cutting two strips of steel of the required length, bending each of them so it has portions lying in a line and fingers projecting from said line spaced farther apart than the width of the fingers, nesting the two strips so their fingers extend mutually into said wider spaces, the ends of the fingers contacting with said portions lying in a line,the sides of the fingers of one strip being spaced from those of the fingers of the other, and seproper width and length into such shape that they each have portions lying in a line and fingers projecting from said line spaced farther apart than the width of the fingers, nesting the two strips so their fingers extend mutually into said wider spaces, the ends of the fingers contacting with said portions lying in a line, the sides of the fingers of one strip being spaced from those of the fingers of the other, and securing said contacting portions together, inserting said partition in contact with all of the edges of all of the tabsand with the edges of the sheet between the tabs and welding it to saidedges.

6. A sheet-steel superheater header including a steel sheet having a portion bent to form three sides of an elongated chamber, and having spaced tabs extending from the two long free edges, the tabs extending from one edge being alined with those extending from the other. g i

7. In a sheet-steel superheater header, the combination of a steel sheet having a portion bent to form three sides of an elongated chamher and having? spaced tabs extending from the two long free edges, the tabs extending from one edge being alined with those extending from the other, and a steel strip bent to follow the edges of the tabs and the edges of the sheets between the tabs and secured to said edges.

8. In a sheet-steel superheater header, the v combination of two structures inaccordance with claim 7, eachhaving an elongated chamher with parallel spaced fingers extending from "and communicating with it, the fingers of one being inserted between the fingers of the other and the portions of each strip at l the tips of the fingers beingsecured to the portions of the other strip between the fingers. 9. A structure in accordance with claim 6,

'10. A structure in accordance with claim 6, the tabs of one set being made of two thicknesses of the sheet secured together.

o'rro v. THIELE.

iao i 

